Is it dangerous to drive with a failing master cylinder?

Not immediately dangerous for driving safety, but a complete failure will leave you unable to change gear — repair promptly rather than risk being stranded.

Can the cylinder be rebuilt instead of replaced?

Rebuild kits with new seals exist for some models, but given the low cost of a new unit, full replacement is often more reliable and just as economical.

What is the master cylinder made of?

An aluminium or cast iron body with an internal piston and rubber seals.

What is this part and what does it do?

Full description available in the product description section above. Contact us with clarifying questions.

How do I tell if my part is faulty?

See the 'Signs of a faulty part' section above or run a diagnostic at an auto service.

Yes - all our used parts are tested before sale and sold with guaranteed quality.

When should the part be replaced?

When warning signals appear, diagnostic codes are present, or the system malfunctions.

Clutch cylinder BMW 320D E46 2004 TOURING

Name: Clutch cylinder BMW 320D E46 2004 TOURING
Brand: BMW
SKU: 21526758822
Price: 18.00 EUR
Availability: InStock

OEM: 21526758822

Disassembled car photo

Engine running

Tested before shipping
Guaranteed quality
Fast delivery 3–7 days
14-day returns

What is this part and why does it matter?

The clutch master cylinder converts the driver’s foot pressure on the clutch pedal into hydraulic pressure, sent through a pipe to actuate the clutch.

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Not sure about compatibility? Send us your car's VIN and we'll confirm.

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Signs of a faulty part

If you notice any of the following, the part likely needs replacement:

Clutch pedal feels spongy, sinks slowly to the floor, or stays on the floor
Fluid leak near the pedal box (inside the cabin, under the dash)
Difficulty selecting gears

Installation information

Requires bleeding the clutch hydraulic system after installation — check the pedal linkage engages the cylinder’s pushrod correctly.

Donor vehicle description

VIN: WBAAP71020PP24817
Make, model: BMW 320 E46
Year: 2004
Engine: Dizelis 2,0L 110KW M47TU
Transmission: Mehāniska 6-pārnesumu GS6
Drive: Aizmugures piedziņa
: Stūre kreisajā pusē
Colour: BLACK SAPPHIRE METALLIC (475)

276 parts from this car

Frequently asked questions

A worn internal seal in this cylinder lets hydraulic fluid bypass internally rather than building pressure, causing the pedal to slowly sink under sustained pressure.

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September 2026
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